Durable glass–epoxy composites cured at low temperatures—Effects of thermal cycling, UV irradiation and wet environment

1993 ◽  
Vol 31 (4) ◽  
pp. 339-345 ◽  
Author(s):  
Gilberto Rinaldi ◽  
Giancarlo Maura
Keyword(s):  
Thermal Cycling ◽  
Uv Irradiation ◽  
Low Temperatures ◽  
Epoxy Composites

Effect of hybrid thermal cycling and shock on flexural properties of nanoclay/glass/epoxy nanocomposites

2021 ◽  
pp. 096739112110132
Author(s):  
A Bayat ◽  
M Damircheli ◽  
M Esmkhani
Keyword(s):  
Flexural Strength ◽  
Thermal Cycling ◽  
Epoxy Composites ◽  
Flexural Properties ◽  
Flexural Stiffness ◽  
Thermal Cycles ◽  
Epoxy Nanocomposites ◽  
Static Conditions

In present research, the flexural properties of glass/epoxy composites reinforced by nanoclay particles (3, 5 and 7 wt.%) under various hybrid thermal cycling and shock loadings (15 and 30 thermal cycles at immediate −70°C and +100°C temperatures) have been investigated. It was found that the flexural strength of 5 wt.% nanoclay/glass/epoxy nanocomposites under 15 and 30 hybrid thermal loadings was enhanced by 19.35% and 20.78%, respectively. Also, after 15 hybrid thermal loadings, the flexural stiffness of 5 wt.% clay/glass/epoxy nanocomposites increased by 9.30% compared to static conditions. More importantly, after 30 hybrid thermal loadings, by adding more filler contents, the flexural stiffness was increased. For instance, at 7 wt.% clay/glass/epoxy nanocomposites, the flexural stiffness enhanced 17.97% compared to neat composite. FESEM morphology images confirmed that presence of optimum filler contents changed the composites inherent properties. Therefore, the outcome of this research can show various remarkable advantages for researchers to apply nanoclay as nanofillers to reinforce composites structures under hybrid thermal cycling and shock applications.

scholarly journals Assessment of cumulative damage by using ultrasonic C-scan on carbon fiber/epoxy composites under thermal cycling

2012 ◽  
Vol 15 (4) ◽  
pp. 495-499 ◽  
Author(s):  
Marcos Yutaka Shiino ◽  
Maria Candida Magalhães Faria ◽  
Edson Cocchieri Botelho ◽  
Pedro Carlos de Oliveira
Keyword(s):  
Carbon Fiber ◽  
Thermal Cycling ◽  
Cumulative Damage ◽  
Epoxy Composites ◽  
Carbon Fiber Epoxy

Cluster–Micelle Transition of a Thermo- and Photoresponsive ABC Triblock Copolymer in an Ionic Liquid

2019 ◽  
Vol 72 (2) ◽  
pp. 155
Author(s):  
Aya Saruwatari ◽  
Kei Hashimoto ◽  
Ryota Tamate ◽  
Ryoji Usui ◽  
Hisashi Kokubo ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Transition Temperature ◽  
Ethylene Oxide ◽  
Uv Irradiation ◽  
Low Temperatures ◽  
Triblock Copolymer ◽  
Abc Triblock Copolymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Azobenzene Groups

We report the photocontrollable micelle–cluster transition of an ABC-type triblock copolymer in an ionic liquid (IL). Polystyrene-b-poly(ethylene oxide)-b-poly(4-phenylazobenzyl acrylamide-r-N-isopropylacrylamide) (PSt-b-PEO-b-P(AzoBnAm-r-NIPAm)) was synthesised, where PSt is IL-phobic, PEO is IL-philic, and P(AzoBnAm-r-NIPAm) is photo- and thermoresponsive in the IL. At high temperatures, the triblock copolymer forms micelles with PSt cores; furthermore, at low temperatures, micelles self-assemble into clusters induced by the aggregation of P(AzoBnAm-r-NIPAm). Under UV irradiation, the micelles form clusters at lower temperatures than that in the dark because of the change in the solubility of P(AzoBnAm-r-NIPAm) induced by photoisomerisation of the azobenzene groups, indicating that this triblock copolymer has a photocontrollable micelle–cluster transition temperature.

scholarly journals UV irradiation/cold shock-mediated apoptosis is switched to bubbling cell death at low temperatures

Oncotarget ◽  
2015 ◽  
Vol 6 (10) ◽  
pp. 8007-8018 ◽  
Author(s):  
Szu-Jung Chen ◽  
Pei-Wen Lin ◽  
Hsin-Ping Lin ◽  
Shenq-Shyang Huang ◽  
Feng-Jie Lai ◽  
...  
Keyword(s):  
Cell Death ◽  
Uv Irradiation ◽  
Low Temperatures ◽  
Cold Shock
Sign in / Sign up

Export Citation Format

Share Document